Concrete form



Jan. 10, 1928. 1,655,629

. T. J. SENESAC CONCRETE FORM Filed Feb. 14, 1927 2 Sheets-Sheet. 1

Jan. 10, 1928. 1,655,629

"r. J. SENESAC CONCRETE FORM Filed Feb. 14, 1927 2 Sheets-Sheet 2.

15 I ea Patented Jan. 10, 1928.

warren stares PATET OFFICE.

TELESPHOBE J. SENESAC, OF CHICAGO, ILLINOIS.

CONCRETE FORM.

Application filed. February 14., 1927. Serial No. 16?,880.

lhis invention relates to metallic forms for'use in the pouring of concrete beam and floor construction. The object or" the invention is to provide a set of forms which may be easily assembled or disassembled, and which may be variably adjusted to differences in the spacing of concrete beams so that a single cost 0iforms may be employed under diverse conditions. A further object of the invention is to so provide the forms that they will be mutually self supporting, so that the danger of bend ing or distortion under the concrete load is avoided.

Further objects and details will appear from a description of the invention in conjunction with the accompanying drawings wherein Figure 1 is a perspective view of a floor under construction employing the forms of the present invention;

Fig. 2 is a similar view showing forms of a slightly modified character;

Fig. 3 is a perspective view of one of the end main forms of the series;

Fig. e is a similar form of one of the intermediate main forms of the series;

F ig- 5 is a similar view of one of the supplemental end forms;

Fig. 6 is a similar view of one of the intermediate end forms;

Figs. 7, 8, 9 and10 are perspective views showing a set of forms of slightly modified construction;

Fig. 11 is an enlarged cross sectional view showing the form arrangement exemplified in Figs. 1,7, 8, 9 and 10; and

Fig. 12 is a crosssectional view showing the form arrangement exemplified in Figs. 2, 3, 4:, 5, and 6.

Referring to the forms shown in Fig. 1,

each set of forms comprises a pair of main end forms 12 of box-like construction having parallel side walls 13, a top wall l t, and a single end wall 15, the bottom and one end being left open. One of the forms 12 is located at each end of a. series in telescoping arrangement with respect to one or more intermediate forms 16 shown in detail in Fig. 10. The intermediate forms comprise parallel side walls 17 and'a top cross wall 18, the intermediate forms being open at each end and at the bottom. In conjunction with the main forms 12 and 16 is a series of supplemental forms 20. Each supplemental form comprises a top cross wall 21, a single side wall 22 and an end wall 23, and each of the intermediate supplemental forms, as shown in Fig. 7', comprises a top wall at and a single side wall 25 constituting in effect an angle plate without ends.

The arrangement is one which permits the main forms in the series to lie in endwise telescoping relation to one another with a series of supplemental forms constituting a lateral extension to the main series with their top walls in overlapping relation with the top walls of the main series. The end forms of each series being provided with end walls constitute a closure at each end of each .iorm' series, and the side walls of the main forms on the side adjacent to the supplemental forms constitute a continuous center reinforcing wall for supporting the entire form structure centrally from end to end. The arrangement is one which permits 01 a wide variation both in the length and in the width of the form series, and the forms being made of comparatively thin, though relatively firm, sheet metal, the over laps will not introduce any appreciable shoulders or ridges in the poured concrete.

The modified forms shown in Figs. 2, 3, 4t, 5, and 6 diiier from those previously described only in the provision of the flanges 26 along the margins of the side walls, the construction and arrangement of the forms being otherwise identical with that heretotore described. The main forms of the series are provided along the inner angle between the side and top walls with a nailing strip 27 above which the form is provided with a series of slots or apertures 28 which expose the wooden strip and furnish a nailing surface for the reception of tacks 29 which are entered through selected nail holes 30 arranged in transversely extending rows, the arrangement being such that the supplemental forms lap over the main forms the desired extent and arenailed through the holes which happen to register with the slots 28, which arrangement serves to unite the forms and hold the outer side walls of the associated forms in properly spaced relation with respect to one another. This permits the side walls of the forms to stand in vertical relation to the top walls so that the cement when poured will furnish truly vertical beams having parallel side walls, thereby effecting economy in the use of cement as compared with the employment of forms Ill) having upwardly converging side walls which are frequently provided to assist in the removal of the forms after the setting of the cement.

.ln setting up the forms of the un'l'langed series first described, wooden joists 31 are set up in spaced relation immediately below the position to be occupied by the cement beams, and each of the joists is provided along its top with a cross rail 32 which furnishes a base form for the lower edge of the concrete beam. On each side of each joist, in spaced relation with the top rail, is a furring strip 83 which furnishes a ledge for the support oi a series of cross beams each provided near each end with a spacing block The lower edges of the outer side walls of the assembled forms rest between the bloclrs and the adjacent edge of the rail 32, and are thus held against displacement. lfhe intermediate side walls of the main forms of the series rest directly upon and are supported by intermediate portions of the cross rails, and with the form set up in the manner indicated, the cement is poured. After the cement is set, the cross rails 3% may be easily removed by swinging their ends sulliciently to disengage them from contact with the furring strips after which the lower edges of the lower side walls may be sprung 1nwardly sufiiciently to disengage the form as a whole and permit its easy removal. In case difficulty is experienced in removing the forms, the main forms may be pulled away from the tacks which are nailed into the nailing strips 27, so that in no case will any dilliculty be experienced in removing the form.

In setting up the forms illustrated particularly in Figs. 2, 3, l, 5, 6 and 12, the flanges 26 are secured directly by tacks 36 to the rails 37 and 38, as best indicated in Fig. 12, but in other respects the setting of the forms follows the practice first indicated.

The ar angement of the forms is one which enables them to be easily and cheaply constructed of sheet material and permits a large number of forms to be nested together for shipment. The construction is one which permits forms of standard size to be readily employed under diverse conditions and to readily conform to such spacing arrangement of the beams as may be required.

I claim:

1. In forms for pouring plastic materials, a main form having spaced side walls and a top cross wall, and a supplemental form having a single side wall and a top wall adapted to overlap the top wall of the main form, substantially as described.

2. In forms for pouring plastic materials, a main form having spaced side walls and a top cross wall, a supplemental form having a single side wall and a top wall adapted to overlap the top wall of the main form, and

eas es means for securing the overlapped top walls against displacen'ient, substantially as described.

3. in forms for pouring plastic materials, a main form having spaced side walls and a "top cross wall, a supplemental form having a single side wall and a top wall adapted to overlap the top wall of the main form, and a nailing strip secured within the angle between one of the side walls and the top wall of the main form, and securing means nailed through the overlapped top wall of the sup plemental form and into said nailing strip, substantially as described.

a. in forms for pouring plastic material, the con'ibination of a pluralityof main forms of box-like formation each having parallel side walls and a top cross wall, the main forms lying in endwise telescoping relation to one another, a plurality of supplemental forms of angle formation each having a single side wall and a top Wall, the supple mental forms lying in endwise telescoping relation to one another and having their top walls in overlapping relation. with respect to the top walls of the main forms, substantially as described.

5. in forms for pouring plastic materials, the combination of a plurality of main forms of box-like formation each having parallel side walls and a top cross wall, the main forms lying in endwise telescoping relation to one another, a plurality of supplemental forms of angle formation each having a single side wall and a top wall, the supplemental forms lying in endwise telescoping relation to one another and having their top walls in overlapping relation with respect to the top walls of the main forms, and means for securing the overlapping top walls together, substantially as described.

{5. in forms for pouring plastic materials, the combination of a plurality of main forms of box-like formation each having parallel side walls and a top cross wall, the main forms lying in endwise telescoping relation to one another, a plurality of supplemental forms of angle formation each having a single side wall and a top wall, the supplemental forms lying in endwise telescoping relation to one another and having their top walls in overlapping relation with respect to the top walls of the main forms, meansfor securing the overlapping top walls together, said means including nailing strips secured within the main forms in contact with the top walls thereof, and tacks nailed through the overlapping top walls and into said nailing strip, substantially as described.

7. In forms for pouring plastic materials, the combination of a plurality of main forms of box-like formation, each having. spaced parallel side walls and a cross top wall, forms lying in endwise telescoping relation to one anoth .r, a plurality of supplemental forms each having a single side wall and a top Wall, the supplemental forms lying in endWise telescoping relation to one another and having their top walls in overlapping relation with respect to the topwalls of the main forms, means for securing the overlapped top walls together, a plurality of form supports adapted each to furnish a base for the pouring of concrete beam, each of said supports being formed to furnish a side groove or channel, a plurality of cross rails bridging the space between said grooves or channels and having their ends entered thereinto said rails furnishing supports for the lower edges of the side walls of the main and supple mental forms, and means on said rails bearing against the inner lower margins of the outermost side walls of the series, substantially as described.

TELESPHORE J. SENESAC. 

